Rescuers in Toulon, France, uncovered 11 more bodies Thursday from the rubble of a six-story building that exploded and collapsed, bringing the number of dead to at least 13, city officials said. Twenty-one people remained hospitalized, including six in serious condition. The violence of the explosion Wednesday damaged nearby buildings in the center of this Mediterranean port, including a section of city hall. Mayor Francois Trucy said the explosion, which was initially attributed to gas, appeared to have occurred on the second floor of the 18th century building. It contained both apartments and businesses.